Ploticus is a free software package that creates graphical data
displays for web pages and intranets, paper reports, posters, slides,
or interactive use. Ploticus is script-driven and can be invoked
automatically (automated) from web servers and other programs.
Ploticus can work with flat ascii or spreadsheet data sets that
can include numerics and text as well as dates and times in a wide
variety of notations. It also has built-in capability of computing
frequency distributions, cross-tabs, medians, quartiles, and curve
fitting.